Brake mechanism



5. MIHALY BRAKE MECHANISM Feb. 4, 1930.

Filed March 23, 1927 2 Sheets-Sheet 1 INVENTOR.

ATTORNEYS.

Feb. 4, -1930. s, MHALY 1,745,502

BRAKE MECHANI SM Filed March 23, 1927 I 2 Sheets-Sheet 2 palatal-1mm IVENTOR.

\ ATTORNEYS.

Patented Feb. 4, 1930 UNITED STA STEPHAN MIEALY, E SPRINGFIELD, OHIO BRAKE, MECHANISM Application filed March 23, 1927. Serial No. 177,754.

This invention relates to brake mechanism for railway cars, it particularly relating to theconstruction and disposition of the opcrating devices for the brake shoes.

- One of the objects of the invention is to provide for supporting the operating devices for the brakes solely bythe truck bolster, between the upper and lower surfaces of the bolster, so that no parts ofthose devices will be above or below the bolster excepting the connecting rods which lead to the air brake or hand brake mechanism.

Another object of the invention is to provide operating devices for the brake shoes which may be easily removed for repairs or otherwise.

A further object of the invention is to so connect and support the parts that danger of any portion of the operating devices drop- I ping and dragging on the ground or ties is eliminated.

Other objects will appear from the accompanying description, statement of advantages and the claims.

In the accompanying drawings:

Fig. 1 is a plan view of a railway car truck showing the improved brake mechanism applied thereto.

Fig. 2 is a section on the line 2-2 of Fig. 6.

Fig. 3 is a section on the line 3-3 of Fig. 6.

Fig. 4 is a perspective view of one of the brake shoes and its support and a part of the operating devices for same.

Fig. 5 is a perspective view of a portion of the operating devices.

Fig. 6 is a side elevation of brake mechanism.

Fig. 7 is a section on the line 7-7 of Fig. 1.

Fig. 8 is a section on the line 88 of Fig. 1.

Referring to the drawings, 1 and 2 represent the side frame of the truck, 3 the axles journaled in the usual way in the journal boxes 4 carried by the side frames, 5 the wheels, 6 the bolster vertically movable in the side frames, 7 the spring plank, also supported by the side frames, and 8 the springs between the bolster and plank. The brake the truck and shoes are indicated at 9 and each shoe is pivotally mounted in the usual way upon a head 0 12 having an integral arm 13, the upper end of which is pivotally supported in the usual way from the end of a bracket. 14 secured to the bolster 6.

Swivelly mounted on the bolster is a support in the nature of a pin 15, one end or whichis forked as indicated at 15 This pin extends loosely through a horizontal aperture in the body of the, bolster and is retained in position by a cotter pin as shown in F ig. 1 with its forked end 15 projecting laterally beyond the bolster. Pivoted to the forked end of this pin is a lever 16, the lever being downwardly and upwardly inclined with its upper end projecting slightly above the upper surface of the bolster and perforated to receive a pivot to connect it with a rod 17 (F 8), which leads to the air brake or hand brake mechanism. Pivotall'y connected to the lower end of the lever 16 is a link 18, preferably forked so as to embrace the lever 16, (Fig; F

5 for detail). The other end of this link is formed with an opening to receive the ends of a pair of toggle levers 19, the link and levers being pivotally connected by the pin 20. One of these levers 19 is connected with the brake shoe of one wheel and the other lever is connected to the brake shoe of the other wheel, but as these connections are exactly the same, andbutone train of connections will be described, the same reference characters being applied to like parts. The outer end of the lever 19 is forked to receive a link '21, to which it is pivotally connected by the pin 22, and the other end of the link 21 is forked to receive a lever 23 to which it is pivotally connected by the pin 24. The lever23' projects outwardly and through an opening in a fulcrum block 25, Fig. 4 for detail), and the outer end of this lever (has a beveled nose 23 which projects intoa notch 13'- formed on the rear edge ofthe. arm 13. The outer end of the lever also has an upwardlyextending car 26 which is pivotally connected to a pair of linksQi whichembrace, and are pivotally connected to the hanger arm' '13. The fulcrum block 25 for the; lever 23 islremovably mounted on a rod328: which projects loosely through an 'aperturein the lowerzportion of 'thebolster. This, mechanism constitutesthe operatingdeviees fonthebrakee on one side of the bolster. To operate the brakes on the opposite side of the bolster the conup to the point where they connect with the air brake or hand brake mechanism, are supported by the bolster and are confined in a space between the upper and lower surfaces of the bolster. By thearrangement of the fulcruins 25 and 31 which are supported upon the rod 28 which passes through the body of the bolster, these fulcrums form supports for the arms 23 and 30, which in turn, through the links 27, will form supports for the brake shoes and their hangers in the event of breakage of the pivotal connection of the arm 13 with-the bracket 14. Further, these fulcrums being merelyloosely mounted on the rod 28 and-held in position byv pins 28 can be readily removed for repairsby removing the pins and withdrawing the rods 28. V

Further,the links 29'which pass through the bolster form an additional support for the arms 23 and 30, and also serve to support the toggle levers 19, which in turn serve to support the links 21.1 1

Having thus described my invention, I claim:

1. In a brake mechanism for railway cars,

the combination, with a truck bolster and brake shoes, of operating devices for said brake shoes carried by said bolster including a lever connected with each shoe and a ful crum block for said lever, said fulcrum blocks i being arrangedin pairs with theiblocks of each pair removably mounted upon a com-' mon support, said common support being removably'carried by said bolster;

2. In a brake mechanism for railway cars,

, the combination of a truck, a bolster carried thereby and brake shoes, opera-ting mechanismj for said brake shoes'including a lever connected with each shoe, fulcrum blocks for said levers arranged in pairs with one block of a pair on each side of the bolster, and a rod extending loosely through said bolster upon which said blocks are removably mounted.

3. In abrake mechanism for railway cars, the combination'of a truck bolster andbrake shoes, operating devices for said brake shoes blocks being apertured to receive and support said levers, and a common supporting member for each pair of blocks upon which said blocks are removably mounted, said supporting member being removably supported by said bolster.

4. In a brake mechanism for railway cars, the combination of a truck bolster,'two pairs of brake shoes, one pair on each side of said bolster, a main operating lever pivotally mounted on saidbolster at one side thereof, a

pair of levers pivoted together to form toggle levers, a link pivotally connectingsaid main operating lever with said toggle levers, a brake lever for each brake shoe, fulcrum. carried by said bolster for said brake levers, and a link for pivotally connecting each brake lever with one of said toggle levers, two of said links passing through apertures in said bolster.

hanger pivotally supported fromsaid frame, a brake shoe at the lower end of said hanger, a lever supported against downward movement by the truck frame having an operative con;

nection with said hanger and shoe, and a pivoted safety link between said lever and hanger.

6. In a brake mechanism, a truck frame, a

hanger pivotally supported from said frame,

a brake shoe at the lower end of said hanger, a horizontally-arranged lever having an op erative connection with said hanger, means for supporting said horizontal lever against downward movement from said truck frame;

but permitting horizontal movement thereof,

and a safety link pivotally connectedto said hanger and to the, upper side of the outer end of said horizontal lever. In testimony whereof, I

my hand this 19th day of March, 1927. V

STEPHAN MIHALY.

have hereunto set:

, 5. In a brake mechanism, a truck frame, a

ioo

- including a horizontal lever connected with "eachshoe,'ifulcrum blocks for said levers arranged in pairs with the blocks of each pair on opposite sides of the bolster, said fulcrum. 

